Testing showed that disabling GL enforcement is not enough.
Seems like gnome-session-3.9.99 suffers from severe stability issues, it
crashes frequently with GL enforcement disabled.
I've prepared back-ported from gnome 3.12 package:
https://launchpad.net/~eugenesan/+archive/ppa/+sourcepub/4095467/+listing-archive-extra
It contains a fix for GL enforcement (100_kill_gl_enforcement.patch) and
upstream fixes, combined they solve the problem.
I hope package maintainers will find a way to "extract" the fix from the
package above or import it to official repos.
** Changed in: gnome-session (Ubuntu)
Status: Confirmed => Fix Committed
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https://bugs.launchpad.net/bugs/1251281
Title:
gnome-flashback (metacity) fails to start without hardware
acceleration, cloud/remote environments
(Forwarded-X/XRDP/VNC/NX/X2GO/Chromoting)
Status in “gnome-session” package in Ubuntu:
Fix Committed
Bug description:
When trying to launch gnome-flashback (metacity) session from
XRDP/VNC/NX/X2GO/Chromoting it fails with diagnostics in log:
>gnome-session-is-accelerated: No composite extension.
>gnome-session-check-accelerated: Helper exited with code 256
>gnome-session-is-accelerated: No composite extension.
>gnome-session-check-accelerated: Helper exited with code 256
>** (process:11622): WARNING **: software acceleration check failed: Child
process exited with code 1
When starting manually gnome-panel, metacity, nautilus and other
components from .xsession - it works normally.
Looks like - unnecessary check performed (and failed).
This breaks gnome-flashback, breaking upgrade path from previous LTS
and removing most sane option for cloud environments!
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